function renderTQExtRegionListHeader(value, cellmeta, record, rowIndex,
		columnIndex, store) {
	var cm = getGridCm('tracklist');
	var fieldName = cm.getDataIndex(columnIndex);
	if (fieldName == 'CTIME') {
		return formatTime(value);
	} else if (fieldName == 'LON') {
		var lon = record.data['LON'];
		if (lon.length > 15) {
			return '基站定位';
		} else {
			return 'GPS定位';
		}
	}

	return value;
}